Evista isn't used to treat breast cancer or to reduce the risk of it coming back.

How it's given: Evista is taken orally as a pill.

Additional information: Unlike tamoxifen, Evista isn't affected by the CYP2D6 enzyme. So it may be a good risk-reduction option for postmenopausal women at higher-than-average risk for breast cancer who have an abnormal version of the CYP2D6 enzyme or are taking another medicine that blocks CYP2D6 activity.